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Fair Value (Amount Of Gains And Losses From Changes In Fair Value Included In Earnings) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Fair Value [Abstract]        
Interest income $ 8 $ 22 $ 29 $ 40
Interest expense 12
Change in fair value 3 (9)   3
Total change in fair value $ 11 $ 13 $ 41 $ 43